<script type="text/javascript" src="<?php echo $this->webroot; ?>js/jquery.min.js"></script> 
<script>
 $(function(){
 $('body').append(
 '<div id="ban_left" class="ban_scroll"><a href="./gioi-thieu/dieu-le-cong-ty"><img src="<?php echo $this->webroot?>img/news/QC4.jpg"/></a></div>',
 '<div id="ban_right" class="ban_scroll"><a href="./gioi-thieu/dieu-le-cong-ty"><img src="<?php echo $this->webroot?>img/news/QC5.jpg"/></a></div>'
 );
 $(window).scroll(function(){
 var $toado_old=0;
 var $toado_curr=$(window).scrollTop();
 $('.ban_scroll').stop().animate({'top':$toado_curr-$toado_old+100},400);//Cách TOP 100px
 $toado_old=$toado_curr;
 });
 });
 </script> 
 <style>
 div.ban_scroll{
 width: 130px;height: 400px;
 position: absolute;
 bottom: 100px;
 }

 div#ban_left{
 left: 1px;
 }
 div#ban_right{
 right: 1px;
 }
 </style> 